Help for GTK API Calling

Targets Linux
1

I want write a program, and need to check is input method is running (Xojo’s KeyDown event always raised, so that I can’t confirm if user press a key is input Chinese Word or want to move position. )

API URL?https://developer.gnome.org/gtk3/stable/GtkIMContext.html#gtk-im-context-filter-keypress

And I am not sure how to call it correctly…

[code]//Soft Declare Function gtk_im_multicontext_new Lib “gtk” () As Ptr
Declare Function gtk_im_multicontext_new lib “libgtk-x11-2.0.so” as Ptr
//Declare Function gtk_im_context_filter_keypress lib “libgtk-x11-2.0.so” (GtkIMContext as Ptr, GdkEventKey as Ptr) as Boolean
//Declare Function gtk_im_context_filter_keypress lib “libgtk-x11-2.0.so” () as Boolean
Soft Declare Function gtk_im_context_filter_keypress Lib “gtk” () as Boolean

'Dim im_context,EventKey As MemoryBlock
'im_context=gtk_im_multicontext_new()

'Label1.Text=CStr(gtk_im_context_filter_keypress(im_context,EventKey))
If gtk_im_context_filter_keypress()=True Then
Label1.Text=“True”
Else
Label1.Text=“False”
End If[/code]

Please help~ Thanks~

2

I think you need to override the event handler to get EventKey. Not sure how to do that in Linux… or if it’s even possible via declares. Might require a plugin. Maybe MBS can help?
https://developer.gnome.org/gtkmm-tutorial/3.4/sec-keyboardevents-overview.html.en

3

I know there’s GdkEventKey struct, but I’m don’t how do it with xojo… ~"~
https://developer.gnome.org/gdk/stable/gdk-Event-Structures.html#GdkEventKey

And I tried MBS Plugin, same as KeyDown/KeyUp problem, I can’t difference it’s in input method or not…

4

Are you trying to capture keys in a text field or text area & decide ?

5

I capture keys in a TextField(1) , and I want to move to next TextField(2) when user press ? .
But when user press down, he may choice a word in input method, also may really want to go next TextFiled…

6

Well then I’ll ask “does this work correctly in the code editor in the IDE on Linux ?”
If it does then you might want to NOT use a TextArea and consider using the TextInputCanvas.
If it does not then I’d guess we have an issue we need to fix in the text input canvas.

7

I think there’s no issue with everything, the keyboard is pressed surely, so that KeyDown/KeyUp raised is correct.
So it’s not only happen in Linux, also happen in Mac/Windows.

In my think, I want to use API to check if user in input method, so I found the “gtk-im-context-filter-keypress”.

Now I will try TextInputCanvas, if I make sense how it compiler…

8

I can say that in OS X the only way to make this work is to use the TextInputCanvas as you cannot handle input methods without it
I’m not certain that is true on Linux & Windows

9

I still had no idea how TextInputCanvas compiler…

In Xcode, It’s shows 2 warnning, but said success. (and I don’t find where it is.)
http://i.imgur.com/HcEzxHy.png

In Ubuntu, It’s shows no gtk±2.0 package, I will try build in other version of linux.
http://i.imgur.com/OOAtBCv.jpg

10

TextInputCanvas Compiled Plugin

HTH.

11

WOW!!
Thanks a lot. I’ll try it~

12

Not work in Linux, seems I had to try compiler it under Ubuntu.

13

Yes sorry It was late and I forgot to add that I compiled it on Mac OS with XCode 5.

14

You don’t need to say that. Very thanks for your help.

I don’t know even how to compiler in XCode.

15

Compiled successful.

Enter ‘make’ command at same Folder in Terminal.
If it show’s no gtk2 lib, run ‘sudo apt-get install libgtk2.0-dev’.
Then you will get a .so file as a plug-in.

16

Great job EShen!

17

Thanks. :slight_smile:

Now I’m finding documents of this control…

Trying how to input with it… ~"~

18

This is a good thread from Norman and Joe of Xojo talking about what documentation there is for it.

TextInputCanvas Info Thread

HTH

19

Very useful. I’m reading. Thank you~~

20

Still had no idea how to use it… <(???)"a

Many Events look like methods and properties.

Are there any examples?